Cotton disease research focuses on studying the various pathogens that affect cotton plants and developing strategies to manage and control these diseases. Common cotton diseases include fungal infections such as Fusarium wilt, Verticillium wilt, and cotton root rot, as well as bacterial diseases like bacterial blight and bacterial angular leaf spot. Researchers in this field work to identify disease-resistant cotton varieties, develop effective chemical and biological control methods, and improve overall disease management practices to ensure healthy cotton crops and high yields.